Agricultural Work Management System and Agricultural Crop Harvester

ABSTRACT

An agricultural work management system includes: a data input unit configured to receive, from an agricultural crop harvester, harvesting position data indicating a harvesting work position as agricultural land information, harvest amount data indicating a harvest amount of the agricultural crop harvested in the agricultural land, and quality data indicating the quality thereof as agricultural crop information; a database server configured to store the agricultural land information and the agricultural crop information such that they can be associated with each other; an agricultural work evaluation unit configured to perform agricultural work evaluation on the agricultural land based on the agricultural land information and the agricultural crop information; and a data output unit configured to send out the agricultural work evaluation data generated by the agricultural work evaluation unit.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No.16/531,196, filed Aug. 5, 2019, which is a divisional of U.S. patentapplication Ser. No. 14/431,098 filed on Sep. 9, 2013, which is a UnitedStates national phase of International Application No. PCT/JP2013/074251filed on Sep. 9, 2013, and claims priority to Japanese PatentApplication No. 2012-213253 and 2013-064837 filed Sep. 26, 2012 and Mar.26, 2013, respectively, the disclosures of which are hereby incorporatedin their entirety by reference.

TECHNICAL FIELD OF THE INVENTION

The present invention relates to an agricultural work management systemthat manages agricultural land information relating to an agriculturalland in which harvesting work is performed using an agricultural cropharvester, and agricultural crop information relating to an agriculturalcrop obtained with the harvesting work. Furthermore, the presentinvention relates to an agricultural crop harvester incorporated in suchan agricultural work management system, and in particular, relates to agrain harvester that includes a threshing apparatus that carries outthreshing processing on grain stalks cut from a field, and a grain tankthat stores grain sent from the threshing apparatus.

BACKGROUND OF THE INVENTION

From Patent Document 1, for example, there is known to be anagricultural work management technique in which a computer system isused to manage information regarding production history and productionmanagement from production of agricultural produce to handing theproduce to a consumer. With the management system according to PatentDocument 1, a growth diagnostic device executes growth diagnostics inpredetermined production unit plots, and the measurement diagnosticresult and position information at each measurement location are storedin a memory card. The stored content is later transmitted to anagricultural work management computer system. Also, in harvesting workperformed using a harvester in work unit plots therefor, the yield ofthe work unit plot is measured using a measurement apparatus attached tothe harvester, the yield of the work unit plot in which harvesting wasperformed, and position information obtained using a GPS (GlobalPositioning System) module are stored in the memory card, and the storedcontent therein is transmitted to the agricultural work managementcomputer system. Measurement is performed by, for example, emittingnear-infrared beams to a growing crop in each work unit plot in a growthunit plot and analyzing the reflected light. In the case of measuringrice, for example, the measurement content is the leaf color, height,number of stems, number of ears, and the like. With this agriculturalwork management technique, since the position and yield are recorded atthe time of harvesting work, it is possible to know the relationshipbetween the position in the field and the yield. However, it is notpossible to know the relationship between the position in the field andquality data relating to the taste of the crop, which is informationthat is important for the crop.

Also, from Patent Document 2, there is known to be an agricultural workdevice management apparatus that divides a field into plots and storesthe work performed by agricultural work vehicles in units of plots. Withthis management apparatus, a work management terminal device that cancommunicate with a controller for a work vehicle includes a DVD (DigitalVersatile Disc) reading apparatus that stores map data, a GPS module,and a gyrosensor, and obtains the outline of the work location from themap data. The obtained map data of the work location is divided intoplots, and local information (existence of hindrances such as utilitypoles) is stored therein. For example, if the agricultural work vehicleis a combine, the total discharge amount of unhulled rice obtained byharvesting work is input as the yield of the entire field. Also, if theagricultural work vehicle is a tractor, tilling depth sensor detectionvalues obtained during tilling work are automatically stored as tillingdepth values for each field plot. It should be noted that in thismanagement apparatus as well, the yield of the crop is dealt with, butquality data relating to the taste of the crop is not dealt with.

Furthermore, an agricultural work machine has also been proposedaccording to which information that is obtained relating to the fieldserving as an agricultural land, such as the temperature, amount ofsunlight, amount of rainfall, agricultural crop growth information, andthe like, is registered in an information center, the growth state ofthe agricultural crop is determined based on these pieces of informationat the time of harvesting work performed by a combine, and therebyprocessing conditions of a cutting unit and a threshing unit areoptimized (e.g., see Patent Document 3). With the technique disclosed inPatent Document 3, it is a prerequisite that the growth information andthe like are acquired individually in advance and registered in theinformation center.

Also, from Patent Document 4, there is known to be a combine in which adetection apparatus that detects grain quality is mounted and a combinedrive state that is to be employed is reported based on the result ofdetection performed by the detection apparatus. Specifically, thecombine is configured to display an optimal threshing value based on theresult of detecting the moisture content of the grain, and based onthat, an operator can adjust the driving speed of a threshing cylinderand the like. Patent Document 4 does not disclose that moisture contentand the like of the grain obtained during harvesting work are used afterthreshing work as quality data relating to taste.

From Patent Document 5, there is known to be a crop harvester in whichthe quality of the crop is measured by a crop quality measurement meansand the measurement information is outputted by an information outputmeans to an external device. The taste, moisture value, quality ofexternal appearance, or the like of the crop is disclosed as the qualitythat is measured accompanying harvesting of the crop by the cropharvester. Measurement information relating to quality is gathered incorrespondence with each of multiple different locations (fields oragricultural lands) in which harvesting work was performed, and themeasurement information is outputted to an external device via wirelesscommunication or a removable storage medium. In furtherance thereto, atthe location to which the measurement information is outputted, a tastemap is created based on the measurement information, in which map theaverage value of the taste in the field and a variety code are writtenfor each region designated in advance and for each field identificationcode, but it is not disclosed that the measurement value of the tasteand the like is allocated to the harvesting position in the field or theagricultural land.

PRIOR ART DOCUMENT(S) Patent Document(s)

Patent Document 1: JP 2002-149744 A

Patent Document 2: JP 2004-213239 A

Patent Document 3: JP 2011-77980 A

Patent Document 4: JP H11-32550 A

Patent Document 5: JP H11-53674 A

SUMMARY OF THE INVENTION Problem(s) to be Solved by the Invention

In view of the foregoing circumstances, an agricultural work managementsystem is desired according to which, at the time of harvesting anagricultural crop using an agricultural crop harvester, agriculturalland information including the position in the agricultural land inwhich the harvesting work is being performed and agricultural cropinformation including the quality of the agricultural crop obtained withthe harvesting work are generated and stored in a database to be used asneeded.

More efficient agricultural administration by means of IT technology isbeing planned and put into practice. The most important agriculturalcrops for such IT agricultural administration are rice, wheat, and thelike. There is a possibility that with these agricultural crops, thereis a relationship between the harvest period, harvest location, and thelike and the quality thereof, and thus, grain evaluation at the time ofharvest is important. However, in the current state, grain harvested byan agricultural crop harvester is conveyed to a management center or thelike, where evaluation of the taste and the like of the grain is firstperformed, and grain evaluation at the time of harvest has not beenrealized. For this reason, as an object of the present invention, anagricultural crop harvester that can perform harvesting work whileimmediately evaluating yield, taste, and the like of harvested grain isalso desired.

Solution(s) to the Problem(s)

In order to manage agricultural land information relating to anagricultural land in which harvesting work is performed by anagricultural crop harvester and agricultural crop information relatingto the agricultural crop obtained with the harvesting work, anagricultural work management system according to the present inventionincludes: a data input unit configured to receive, from the agriculturalcrop harvester, harvesting position data indicating a harvesting workposition in the agricultural land as the agricultural land information,and harvest amount data indicating a harvest amount of the agriculturalcrop harvested in the agricultural land and quality data indicating thequality thereof as the agricultural crop information; a database serverconfigured to store the agricultural land information and theagricultural crop information such that they can be associated with eachother; an agricultural work evaluation unit configured to performagricultural work evaluation of the agricultural land based on theagricultural land information and the agricultural crop information; anda data output unit configured to send out the agricultural workevaluation data generated by the agricultural work evaluation unit.

According to this configuration, the harvesting position data, harvestamount data, and quality data obtained as a result of the agriculturalwork performed by the agricultural crop harvester can be stored inassociation with each other in a database. By associating anagricultural land specified based on the harvesting position data withthe harvest amount and quality of an agricultural crop harvested in thatagricultural land with each other, agricultural work evaluation in unitsof agricultural lands is possible. The agricultural work evaluation dataobtained using the agricultural work evaluation is sent out in responseto a data download request. By displaying the agricultural workevaluation data on a user terminal, an agricultural worker, who is auser, can know not only the harvest amount but also the quality of theagricultural crop in the agricultural land of interest.

In order to achieve more efficient agricultural work by feeding backinformation relating to the harvest amount and quality in units ofagricultural lands into the subsequent agricultural work, it ispreferable that consideration is also given to the fact that even in thesame agricultural land, the harvest amount and quality change due to thefact that sunshine conditions and soil properties differ according toslight changes in the location. For this reason, in one preferredembodiment of the present invention, the agricultural land informationis generated in association with small plots obtained by theagricultural land that is to be subjected to work being divided by apredetermined size, and the agricultural crop information is alsogenerated in association with the small plots. For example, if a smallplot is set as an area with one side being several meters to severaltens of meters long, it is possible to know that a reduction in harvestamount or a reduction in quality has occurred due to a shadow cast by ashed or a large tree, local soil defects, or the like, and it is alsopossible to spread a special fertilizer, carry out soil improvement, orthe like in such areas. Also, experimental agricultural work in aspecific area is possible as well.

An agricultural crop harvester such as a combine performs harvestingwork while traveling linearly (in a straight or curved line), andtherefore the harvesting width thereof is around 1 to 3 meters.Accordingly, agricultural crop information acquired over time isobtained in sequence along the traveling route having such a harvestingwidth. Accordingly, if an area with one side being several meters toseveral tens of meters long is used as a unit agricultural land area foragricultural evaluation, it is necessary to perform data conversionaccording to which the time-based agricultural crop informationgenerated in correspondence with the agricultural crop harvester travelroute is allocated to the small plots, and therefore it is convenient touse a configuration in which the agricultural work evaluation unitincludes such a function.

If the agricultural crop harvester is applied to a combine for grain, itis convenient to use a configuration in which the harvest amount data isgenerated based on a threshing processing amount per unit time, and thequality data is generated based on a measurement result of a tastesensor unit equipped in the combine. The combine has a functionaccording to which grain obtained by threshing cut grain stalks isretained in a tank or bagged. Accordingly, in the process of this work,it is possible to easily measure a flow amount, or in other words, aharvest amount of the grain. Also, by arranging a taste sensor unit thatemits a light beam on the flowing grain and thereby measures a componentamount of moisture or protein so as to measure the quality (taste) ofthe grain, quality data for the grain can be easily obtained. Forexample, in the case where multiple driers are set to target moistureamounts in a drying facility, it is possible to know in advance whichdrier the grain harvested by the combine is to be carried into, andefficient conveyance to the drying facility is possible. Accordingly, itis effective to use the moisture of the harvested grain as the qualitydata.

The present invention is also directed to an agricultural crop harvestersuitable for the above-described agricultural work management system.This kind of agricultural crop harvester needs to send, to theagricultural work management computer system, agricultural landinformation relating to an agricultural land in which harvesting work isperformed, and agricultural crop information relating to an agriculturalcrop obtained with the harvesting work. For this reason, theagricultural crop harvester according to the present invention includes:a positioning module configured to measure the crop harvester'sposition; a yield sensor configured to measure a harvest amount of anagricultural crop harvested in the agricultural land; a quality sensorconfigured to measure quality of the agricultural crop harvested in theagricultural land; an agricultural land information generation unitconfigured to, based on a measurement result of the positioning module,generate harvesting position data indicating a harvesting work positionin the agricultural land as the agricultural land information; anagricultural crop information generation unit configured to generateharvest amount data as the agricultural crop information based on ameasurement result of the yield sensor, and generate quality data as theagricultural crop information based on a measurement result of thequality sensor; a transmission information management unit configured tocreate transmission information by associating the agricultural landinformation and the agricultural crop information with each other; and acommunication module configured to send the transmission information tothe agricultural work management computer system.

With this crop harvester, agricultural land information includingharvesting position data is generated during harvesting work, andagricultural crop information including harvest amount data of theharvested agricultural crop and quality information of the agriculturalcrop is also generated. Transmission information obtained by associatingthe generated agricultural land information and agricultural cropinformation is sent from the agricultural crop harvester to theagricultural work management computer system. Accordingly, the harvestamount and quality of the agricultural crop at predetermined harvestingpositions are accumulated in the agricultural work management computersystem, and therefore, by evaluating this information, it is possible toachieve efficient agricultural work.

In the case of an agricultural crop such as rice or wheat, harvestingwork is performed repeatedly while traveling. For this reason, it isconvenient to calculate the harvest amount per predetermined work traveldistance as the agricultural crop information. In particular, asdescribed above, if the agricultural land information is generated inassociation with the small plots obtained by an agricultural land thatis to be subjected to work being divided by a predetermined size, theharvest amount per small plot can be easily calculated based on theharvest amount per work travel distance.

If the agricultural crop is rice and the quality sensor detects themoisture of unhulled rice, it is convenient to transmit the moisture ofunhulled rice retained in a built-in grain tank or a dryness levelrequired for the unhulled rice along with a retention amount thereof toan external drying facility via a communication module. After receivingthis kind of information, the drying facility can suitably set operationparameters for drying apparatuses before the unhulled rice to beprocessed is imported. Conversely, it is also convenient to transmit theload status of the crop driers and the moisture content of grain in thedriers from the drying facility to the harvester side. By thusperforming two-way communication between the harvester and the dryingfacility and mutually exchanging work data, more efficient work can beperformed by both.

The agricultural crop harvester according to the present inventionincludes: a grain tank configured to store grain sent from a threshingapparatus configured to carry out threshing processing on grain stalkscut from a field; a yield sensor configured to measure yield of thegrain; a taste sensor configured to measure taste of the grain; ameasurement data management unit configured to, in a time series, manageyield measurement data input from the yield sensor and taste measurementdata input from the taste sensor; and a harvest evaluation unitconfigured to generate harvested grain property information by linkingtogether information on position in the field, the yield measurementdata, and the taste measurement data.

According to this configuration, a yield sensor that measures the yieldof the grain sent from the threshing apparatus and a taste sensor thatmeasures the taste of the grain are included in the agricultural cropharvester, and it is therefore possible to measure the yield and tasteof the grain during harvesting. Moreover, since the yield measurementdata and taste measurement data obtained with that measurement aremanaged in a time series, grain harvest time evaluation is possible notonly at a time of harvest but also at a suitable time after harvest.This kind of yield measurement data and taste measurement data arelinked with the field serving as the harvesting location as well and arehandled as harvested grain property information, and therefore cancontribute to IT agricultural administration.

In one preferred embodiment of the present invention, the yield sensoris a load cell included in the grain tank, the taste sensor is anoptical non-contact sensor for measuring moisture of grain, and thetaste sensor is arranged in the grain tank or is arranged on a grainconveyance path extending from the threshing apparatus to the graintank. By measuring the weight of the retained grain using a load cellprovided in the grain tank, which is the retaining location in theagricultural crop harvester for the grain, it is possible not only tosimply measure the yield, but also to measure an increase in the yieldper time or per work travel. Also, by using an optical non-contactsensor, it is possible to measure the moisture, which is important forthe taste of the grain, without damaging the grain. Also, due to thefact that a non-contact sensor is used, the measurement position alsocan be freely chosen from the grain conveyance path that extends fromthe threshing apparatus to the grain tank, including the grain tank.

It is also important to perform precise agricultural administration withconsideration given to differences in environmental conditions such assunlight in the field, differences in soil and fertilizer distributionin the field, and the like by further dividing the field into smallerplots and measuring the yield and moisture of the grain harvested inpredetermined regions resulting from the division. In order to supportthis kind of agricultural administration, in one preferred embodiment ofthe present invention, a configuration is used in which, as the yield,the yield of the grain harvested in a predetermined region of the fieldis calculated based on a travel route and a yield per unit traveldistance, and as the taste, the moisture of the grain harvested in thepredetermined region of the field is calculated based on the travelroute and an average taste of the harvested grain per unit traveldistance.

Similarly, as a more advanced technique for evaluating the yield andmoisture of the grain harvested at the predetermined regions resultingfrom division, in another embodiment of the present invention, a GPSmodule is included which is configured to measure a cutting position ofthe grain stalks in the field, wherein the harvested grain propertyinformation includes the cutting position, and the yield and moisture ofthe grain harvested in a predetermined region of the field arecalculated based on the harvested grain property information. By usingthe GPS module for the position measurement, the cutting position can beaccurately obtained without relying on the travel route of theagricultural crop harvester.

If the harvested grain property information is transmitted to themanagement center or the like using communication at the same time as itis generated, there is no need to store the harvested grain propertyinformation in the agricultural crop harvester. However, givingconsideration also to preparing for the occurrence of communicationerrors or performing sequential checking on the agricultural cropharvester side, it is also preferable to include a storage unitconfigured to store the harvested grain property information.

Common agricultural crop harvesters do not include communication modules(line communication units) that can perform data communication with acomputer system in a remotely-located management center via acommunication line. In such a case, it is convenient to use a mobilecommunication terminal held by a driver of the agricultural cropharvester as the communication module (line communication unit). In thiscase, data communication between the agricultural crop harvester and themobile communication terminal can be performed between a datainput/output unit provided on a vehicle-mounted LAN (Local Area Network)of the agricultural crop harvester and a data input/output unit providedin the mobile communication terminal. Wired communication such as a USB(Universal Serial Bus) connection, or wireless communication such asWi-Fi can be used for this kind of data communication. In order toachieve this object, in a preferred embodiment of the present invention,a configuration is used in which a data input/output unit capable ofdata communication with a mobile communication terminal is included, themeasurement data management unit and the harvest evaluation unit areconstructed in the mobile communication terminal, and the harvestedgrain property information is sent to a management center via acommunication module (line communication unit) of the mobilecommunication terminal.

BRIEF DESCRIPTION OF THE DRAWING(S)

FIG. 1 is a schematic diagram showing a basic configuration of anagricultural work management system according to the present invention.

FIG. 2 is a schematic diagram showing a flow of information in theagricultural work management system.

FIG. 3 is a diagram of a screen shown on a display, in whichagricultural work evaluation data is displayed as a table.

FIG. 4 is a schematic diagram for illustrating a basic configuration fordata processing relating to grain harvested by a grain harvesteraccording to the present invention.

FIG. 5 is a schematic diagram for illustrating an example of processingfor allocating yield and taste to field regions.

FIG. 6 is a side view of a combine to which the present invention hasbeen applied.

FIG. 7 is a plan view of the combine shown in FIG. 6.

FIG. 8 is a schematic diagram showing an overall internal space of adriving portion of the combine shown in FIG. 6.

FIG. 9 is a diagram of a screen displayed on a display, in whichagricultural work evaluation data is displayed as a table in a largeregion about the size of a town or village.

FIG. 10 is a diagram of a screen displayed on a display, in whichagricultural work evaluation data is displayed as tables in units ofsmall plots in an agricultural land surrounded by embankments.

FIG. 11 is a schematic diagram showing an arrangement of a yield sensorand a taste sensor.

FIG. 12 is a functional block diagram showing functional units in acontrol system of a combine and a smartphone incorporated in thecombine.

FIG. 13 is a schematic diagram showing another embodiment of a tastemeasurement mechanism.

EMBODIMENT(S) OF THE INVENTION

Before specific embodiments of the present invention are described,basic structures of the agricultural work management system of thepresent invention will be described. FIG. 1 shows a basic configurationof an agricultural work management system. FIG. 2 shows a flow ofinformation in the agricultural work management system.

With agricultural work in this context, harvesting work for an entirework target agricultural land is performed by repeating linear traveland 180-degree pivoting travel of an agricultural crop harvester(hereinafter abbreviated simply as “harvester”) 1. The agricultural cropharvester 1 is equipped with a terminal computer 6 according to whichdata can be communicated between the terminal computer 6 and amanagement computer system of an agricultural work management center.The terminal computer (hereinafter referred to as “terminal” or “dataprocessing module”) 6 may be fixed to the harvester 1 in a mode such asan ECU (Electric Control Unit) connected to a vehicle-mounted LAN, andit may be connected to the harvester 1 via a cradle or the like as amobile device such as a tablet computer or a smartphone.

The harvester 1 includes a yield sensor 21 that measures the harvestamount of an agricultural crop harvested in the agricultural land thatis to be subjected to work, and a quality sensor 22 that measures thequality of the harvested agricultural crop. The result of measurementperformed by the yield sensor 21 and the result of measurement performedby the quality sensor 22 are sent to the terminal 6. Examples of thequality sensor 22 include a taste sensor that measures moisture andprotein included in the agricultural crop, and the like.

The terminal 6 includes a positioning module 9 that measures the currentposition, or in other words, the position of the terminal 6. It ispossible to use a positioning module 9 known as a GPS module that isbuilt into a tablet computer or a smartphone. In the case of using aterminal 6 that does not include the positioning module 9, thepositioning module 9 needs to be equipped in the harvester 1. However,the positioning module 9 is substantially the same as that used in a carnavigation system, and it is therefore possible to use that positioningmodule 9.

In any case, the terminal 6 includes an agricultural land informationgeneration unit 6 a, an agricultural crop information generation unit 6b, a transmission information management unit 6 c, and a communicationmodule 66. Based on the result of measurement performed by thepositioning module 9, the agricultural land information generation unit6 a generates harvesting position data that indicates a harvesting workposition. The harvesting position data is incorporated in theagricultural land information along with an agricultural land name or anagricultural land ID that specifies the work target agricultural land.Of course, it is possible to specify the agricultural land using onlythe harvesting position data, and therefore the agricultural land nameor agricultural land ID is not mandatory. The agricultural cropinformation generation unit 6 b generates harvest amount data from theresult of measurement performed by the yield sensor 21 and generatesquality data from the result of measurement performed by the qualitysensor 22. The harvest amount data and quality data are handled as theagricultural crop information. The transmission information managementunit 6 c creates transmission information by associating the generatedagricultural land information and agricultural crop information with theharvesting position. The communication module 34 sends the transmissioninformation to an agricultural work management computer system 7 of themanagement center.

The agricultural work management computer system 7 includes aninput/output server 7A, an application server 7B, and a database server7C. The input/output server 7A includes a data input unit 71 that sendsthe agricultural land information and agricultural crop informationincluded in the transmission information received from the terminal 6 tothe application server 7B and the database server 7C. The applicationserver 7B includes an agricultural work evaluation unit 73 that performsagricultural work evaluation on the agricultural land based on theagricultural land information and the agricultural crop information, anda table formation processing unit 74 according to which the result ofthe agricultural work evaluation is made into a table. The databaseserver 7C includes a primary database unit 75, an agricultural workevaluation database unit 76, and an agricultural land map database unit77. The primary database unit 75 functions as a storage unit for sourcedata, which can be written in or read out from while maintaining themutual association between the agricultural land information and theagricultural crop information sent from the harvester 1. Theagricultural work evaluation database unit 76 functions as a storageunit for agricultural work evaluations for each agricultural land,performed by the agricultural work evaluation unit 73, and table dataobtained by the agricultural work evaluation being made into a table.The agricultural land map database unit 77 is basically the same as anormal map database, but it is a map database in which attribute dataunique to the agricultural land, such as soil properties, water drainageproperties, and the like, can be included.

In response to a request, a data output unit 72 included in theinput/output server 7A transmits the agricultural work evaluation datagenerated by the agricultural work evaluation unit 73, or table dataobtained by the agricultural work evaluation data being made into agraphic or a table, to the terminal 6 or another terminal registered inthe agricultural work management system. FIG. 3 shows an example of ascreen displayed on a display of the terminal 6 based on this kind oftable data. In this diagram example, an agricultural land informationdisplay field 8A, in which items relating to the agricultural landinformation are displayed, is arranged in the upper portion of thescreen, and an agricultural crop information display field 8B, in whichitems relating to the agricultural crop information are displayed, isarranged in the lower portion of the screen.

The agricultural land information display field 8A includes agriculturalland ID 81 according to which the agricultural land is specified,agricultural land name (town name, commonly-used name, etc.) 82,agricultural land area 83, and agricultural land map 84. Theagricultural lands in the agricultural land map 84 can be identified(distinguished by color or pattern) by comparing them to a referencevalue indicating the average harvest amount or quality such as theaverage taste value. The agricultural crop information display field 8Bincludes agricultural crop type (e.g. Koshihikari rice) 85, harvestamount (for the entire agricultural land or per unit area) 86, andagricultural crop quality value 87. Here, rice production is handled,and therefore an average protein amount 87 a and an average moistureamount 87 b of the dehulled rice are displayed as the agricultural cropquality value 87.

By viewing this kind of table based on the agricultural work evaluationdata on a screen or by printing it out, the status of the agriculturalland can be understood at a glance.

Next, a basic configuration for processing of data relating to grainharvested by a grain harvester, which is an example of the agriculturalcrop harvester 1 according to the present invention, will be describedwith reference to FIGS. 4 and 5.

As shown in FIG. 4, the grain harvester 1 is equipped with a threshingapparatus 14 that carries out threshing processing on grain stalks cutfrom a field by a cutting unit 12 while traveling, and a grain tank 15that stores grain sent from the threshing apparatus 14 via a grainconveyance path 3. A yield sensor 21 that measures the yield of theharvested grain, and a quality sensor 22 that measures the taste of thegrain are furthermore included. The yield sensor 21 can be constitutedby a load cell included in the grain tank 15. Due to being provided soas to support the grain tank 15, the load cell can measure the weight(yield) of the grain retained in the grain tank 15. In this case, basedon the yield successively measured by the load cell since the start ofharvesting work, it is possible to obtain the yield per unit traveldistance, which can be converted into the yield per unit time, or inother words, the yield per unit area. The quality sensor 22 is anoptical non-contact sensor that measures the moisture and protein of thegrain using spectroscopy, which is arranged in the grain tank 15 orarranged on the grain conveyance path 3. The measurement performed bythe quality sensor 22 is performed in batches or continuously with asampling method. A configuration may be used in which the average ofmultiple measurement results is calculated.

Note that with the grain harvester 1, the terminal 6, which wasdescribed with reference to FIG. 1, is a data processing module 6 thatis configured as one electronic control unit (ECU) of the grainharvester 1. A measurement data management unit 61 and a harvestevaluation unit 62 are configured as the functional units of the dataprocessing module 6 by a program. The measurement data management unit61 can manage, in a time series, yield measurement data input from theyield sensor 21 and taste measurement data input from the quality sensor22. The harvest evaluation unit 62 generates harvested grain propertyinformation by linking data relating to the field serving as theharvesting location, the yield measurement data, and the tastemeasurement data together. Also, a harvested grain property informationstorage unit 63 that stores the generated harvested grain propertyinformation at least temporarily is also prepared.

The data relating to the field includes the field name, the fieldposition on the map, and the like, and if the field is subdivided intopredetermined plots, the plot number is further included. A harvestingposition acquisition unit 23 is included in order to manually ormechanically acquire data relating to position from such data relatingto the field.

The yield measurement data and taste measurement data managed by themeasurement data management unit 61 or the harvested grain propertyinformation generated by the harvest evaluation unit 62 can be sent viaa communication line from a communication module 66 serving as a linecommunication unit to a remotely-located management center 7. In themanagement center 7, the received yield measurement data and tastemeasurement data, or the harvested grain property information is madeinto a database format and stored in the harvested grain propertyinformation database 70 included in the database server 7C of themanagement center (or more accurately, the agricultural work managementcomputer system installed at the management center) 7, and the data canthereby be used for agricultural administration management.

A common grain harvester 1 does not include a communication module (linecommunication unit) 66 that can perform data communication with themanagement center 7 via a communication line. In this case, aconfiguration can be used in which the data processing module 6 isrealized by a mobile communication terminal such as a personal computer,a tablet, or a smartphone, and the data input/output unit 60 of themobile communication terminal and the data input/output unit 50 of theelectronic control unit of the grain harvester 1 are connected such thatdata can be transferred therebetween. Wired communication such as a USBconnection, and wireless communication such as Wi-Fi are suitable forthe connection between the data input/output unit 60 and the datainput/output 50.

Note that if the data processing module 6 is realized by a mobilecommunication terminal with a GPS module, the harvesting positionacquisition unit 23 can also be included in the data processing module6. This kind of harvesting position acquisition unit 23 can acquireposition data obtained by the GPS module of the mobile communicationterminal as the harvesting position. The GPS module can output data onthe position in the field with a rather high degree of accuracy.Accordingly, since the cutting position of the grain stalk, which servesas this kind of accurate harvesting position, can be included in theharvested grain property information, it is possible to calculate theyield and moisture of the grain harvested at a predetermined region ofthe field based on the harvested grain property information and use itfor agricultural administration management.

It is convenient to use the GPS module to obtain the positioninformation relating to the cutting position or the harvesting position,but if it is assumed that the cutting travel route of the grainharvester 1 in the field has already been determined, the cuttingposition can be calculated based on the travel route and the travel timeor travel distance. As an example of this, a method of calculating theyield and taste (in this context, moisture) of grain harvested inpredetermined regions of the field based on the travel route and theyield and average moisture per unit travel distance will be describedwith reference to FIG. 5. In FIG. 2, it is assumed that the grainharvester 1 performs harvesting work in a zig-zag travel route obtainedby repeating linear travel and 180° pivoting in the field.

First, the field is divided into multiple small plots: A1, A2, A3, . . .. Accompanying the harvesting travel of the harvester 1, yield data andmoisture data are input for each predetermined time: t1, t2, t3, . . .or for each predetermined distance: D1, D2, D3, . . . , and thereforeyields: V1, V2, V3, . . . and moisture: Q1, Q2, Q3, . . . are acquiredat that time interval.

Here, letting t1, t6, and t7 be time points at which the traveling ofthe grain harvester 1 belongs to the small plot: A1, the yield: V[A1] ofthe small plot: A1 is obtained using

V[A1]=V1+V6+V7

and the average moisture: Q[A1] of the small plot: A1 is obtained using

Q[A1]=(Q1+Q6+Q7)/3

Furthermore, letting t2, t5, and t8 be time points belonging to thesmall plot: A2, the yield: V[A2] of the small plot: A2 is obtained using

V[A2]=V2+V5+V8

and the average moisture: Q[A2] of the small plot: A2 is obtained using

Q[A2]=(Q2+Q5+Q8)/3

Thus, it is possible to allocate the yield and moisture to each smallplot.

With the example shown in FIG. 5, upon dividing a field surrounded byembankments or the like into multiple small plots, evaluation of theyield and quality for each harvesting position (field) is performed bythe harvest evaluation unit 62. Accordingly, the harvested grainproperty information thereof makes it possible to evaluate the yield andmoisture of the field on a micro scale. However, it is also possible toperform evaluation using fields of an entire region such as a town orvillage as the processing target field. The harvested grain propertyinformation in such a case makes it possible to evaluate the yield andmoisture in fields of an entire region on a macro scale.

First Embodiment

Next, one specific embodiment of a grain harvester that is applied to afirst embodiment of the present invention will be described withreference to the drawings. Here, the grain harvester is a crawler-typeauto-threshing combine (hereinafter to be referred to as simply“combine”) 1. FIG. 6 shows a side view of the combine 1, and FIG. 7shows a plan view of the combine 1.

The combine 1 includes a device body frame 10 obtained by connectingmultiple steel members, such as a rectangular pipe member. A pair ofleft and right crawler travel apparatuses (hereinafter to be abbreviatedas simply “crawlers”) 11 are equipped below the device body frame 10.Toward the front of the right half of the body frame 10, an engine E ismounted, and a driving portion 13 is formed above that. A driver's seat16, a maneuvering lever 17, and the like are arranged in the drivingportion 13. On the front end toward the left of the body frame 10, acutting portion 12 is provided which cuts harvest target crop grainstalks located in front of the body during work traveling and conveysthem rearward. On the left half of the device body frame 10, a threshingapparatus 14 is mounted which receives cut grain stalks conveyed by thecutting unit 12, conveys them rearward while carrying out threshingprocessing on the parts of the cut grain stalks where the grain isattached, and carries out selection processing on the grain obtained bythe threshing processing. Toward the rear of the right half of thedevice body frame 10, a grain tank 15 made of sheet metal is mountedwhich retains grain conveyed upward from the threshing apparatus 14 viaa screw-lift supply conveyor 31. The grain tank 15 is equipped with agrain discharging apparatus 19 that discharges grain retained in thegrain tank 15 to the exterior. A yield sensor 21 that detects the weightof the grain is equipped below the grain tank 15, and a tastemeasurement mechanism 30 in which a taste sensor (quality sensor) 22 isincorporated as a taste analyzer is equipped inside of the grain tank15, although this is only shown schematically in FIGS. 3 and 4.Measurement data for the moisture value and protein value of the grainis outputted from the taste sensor 22 as the quality data.

FIG. 8 is a schematic diagram schematically showing the internal spaceof the driving portion 13. The driver's seat 16, various maneuveringlevers, an operation switch, a meter display panel, and the like arearranged in the driving portion 13. In the present embodiment, theterminal 6 is constituted by a portable tablet-type computer.Accordingly, the terminal 6 is used while mounted on a terminal mountingportion 6A provided near the driver's seat 16. The mounting portion 6Afunctions as a power-supplying connection portion and a data exchangeconnection portion for the terminal 6. Note that a smartphone can beused instead of the tablet-type computer.

A GPS module that functions as a positioning module 9, and acommunication module 66 that can connect to the Internet via a mobilephone line are mounted in the terminal 6. Also, applications thatfunction as the agricultural land information generation unit 6 a, theagricultural crop information generation unit 6 b, and the transmissioninformation management unit 6 c are installed. Accordingly, the harvestamount data from the yield sensor 21, and the moisture value data andprotein value data from the taste analyzer are sent to the terminal 6via the mounting portion 6A. Furthermore, internal data is also sentfrom various ECUs of the combine 1 to the terminal via the mountingportion 6A.

Upon being introduced to a predetermined agricultural land that is to besubjected to harvesting work, the combine 1 repeatedly performs cuttingprocessing and threshing processing while traveling over theagricultural land. At this time, with the positioning module 9 of theterminal 6, positioning data (latitude, longitude) that indicates thecurrent position of the combine 1 is generated, and positioninginformation composed of the actual time and the positioning data is sentto the terminal 6. At the same time, the harvest amount data, andquality data (moisture value and protein value of grain) are also sent.

In the agricultural land information generation unit 6 a of the terminal6, the received positioning data is converted into harvesting positiondata indicating the harvesting work position, and is treated asagricultural land information. At this time, the positioning datacomposed of a longitude value and latitude is converted into acoordinate system in which a predetermined position set in theagricultural land is used as the origin, and the harvesting positiondata can be converted into position data composed of an x coordinatevalue and a y coordinate value. The agricultural crop informationgeneration unit 6 b of the terminal 6 handles the received harvestamount data and quality data as the agricultural crop information. Thetransmission information management unit 6 c associates the agriculturalland information and the agricultural crop information with each othersuch that the relationship between a specific area in the agriculturalland and the harvest amount or quality can later be evaluated. At thistime, temporal shifting between the measurement time for the harvestingwork position and the quality measurement of the grain harvested at thatposition is corrected with consideration given to the time for thecutting processing and the time for the threshing processing. Associatedpieces of agricultural land information and agricultural cropinformation are sent to the agricultural work management center astransmission information. However, the association of the agriculturalland information and the agricultural crop information may be performedon the agricultural work management center side.

In general, since the combine 1 performs harvesting work using zig-zagtraveling in which linear travel and 180° pivoting are repeated on theagricultural land, harvesting of the agricultural crop is performedalong a substantially linear travel route. In contrast to this, thedistribution of the soil quality of the agricultural land, and theconsequent distribution of the agricultural crop quality are spread outover a surface. For this reason, it is convenient to calculateagricultural crop information (harvest amount and quality) for eachsmall plot obtained by dividing the agricultural land that is to besubjected to work by a predetermined size, and attribute theagricultural crop information to each small plot.

It is preferable that the processing for allocating the harvest amount:D and the quality: Q to the small plots of the agricultural land employsa method such as that described with reference to FIG. 5. Accordingly,agricultural crop information (harvest amount and quality) can beallocated to each small plot.

After the agricultural land surrounded by embankments or the like isdivided into multiple small plots, agricultural work evaluation can beperformed by the agricultural work evaluation unit 73. That is to say,the agricultural work evaluation data enables evaluation of the harvestamount and quality in such an agricultural land on a micro scale.However, it is possible to perform agricultural work evaluation treatingthe agricultural lands of an entire region such as a town or village asa processing target agricultural land and treating an agricultural landsurrounded by embankments or the like as a small plot. The agriculturalwork evaluation data in this case makes it possible to performevaluation of the harvest amount and quality in the agricultural landsof an entire region on a macro scale.

For example, if a database server 7C such as that shown in FIG. 1 isconstructed in the management center 7, the agricultural landinformation and the agricultural crop information sent from the combine1 are stored in a primary database unit 75 in a state in which theassociation therebetween is maintained, and the agricultural workevaluation data generated by the agricultural work evaluation unit 73 isstored in the agricultural work evaluation database unit 76.Accordingly, in response to a request from a user, information relatingto the harvest amount and quality of a specific region or agriculturalland is provided to the user. At this time, a table formation processingunit 74 can use the map data stored in the agricultural land mapdatabase unit 77 to generate graphical information obtained by makingthe harvest amounts and quality into a table on a macro or micro scale,using the map as a base. In this embodiment, the input/output server 7Ais constructed as a Web server. The Web server uses a communicationprotocol known as HTTP (Hyper Text Transfer Protocol) to exchange datawith a Web browser installed in the terminal 6. In order to exchangedata with each other, a document written in HTML (Hyper Text MarkupLanguage), XML (Extensible Markup Language), or the like is used, andthe document can include an image, audio, and a program for furtherperforming some kind of processing.

A graphical image can be easily handled with an HTML file or an XMLfile. FIG. 9 shows an example of an agricultural work evaluation screendisplayed by the Web browser of the terminal 6. The top screen of theagricultural work evaluation screen is a map of a region including manyagricultural lands bordered by embankments. The agricultural lands aredistinguished by color, and the details thereof can be changed byselection. With a first selection, color is used to divide theagricultural lands into agricultural lands in which harvesting work iscomplete and agricultural lands in which harvesting work is notcomplete. With a second selection, color is used to divide theagricultural lands into agricultural lands in which a target harvestamount has been reached or exceeded, and agricultural lands in which atarget harvest amount has not been reached. Furthermore, regardingquality, it is also possible to use color to distinguish betweenagricultural lands in which a target protein value has been reached andagricultural lands in which it has not been reached, for example.

Due to a specific agricultural land ZZZ being clicked on, the top screenshown in FIG. 9 shows a sub-window that displays agricultural landinformation, agricultural crop information, and optional agriculturalwork device information, for the agricultural land ZZZ. Here, theagricultural land information includes the agricultural land name, area,crop, work progress, fertilizer (type and amount), and agriculturalchemicals (type and amount), and the agricultural crop informationincludes a dehulled rice harvest amount, average protein, and averagemoisture. Note that the agricultural work device information includesconsumed fuel, work time, engine set rotation speed, maximum watertemperature, and average work speed. The agricultural work deviceinformation is transferred from the ECU of the combine 1 to the terminal6, is furthermore transferred to the agricultural work managementcomputer system, and is stored in the database server 7C. The top screenshown in FIG. 9 also displays an icon indicating the current position ofthe combine 1 registered in the agricultural work management center.

FIG. 10 shows a specific agricultural land ZZZ selected out of manyagricultural lands shown in the top screen in FIG. 9, and theagricultural land ZZZ is constituted by many small plots obtained bydividing the agricultural land ZZZ by a predetermined size. That is tosay, the entire region shown in the top screen in FIG. 7 corresponds toa specific agricultural land ZZZ selected in FIG. 8, and the manyagricultural lands in the top screen in FIG. 9 correspond to the smallplots shown in FIG. 10. Accordingly, by clicking on a specific smallplot A1 on the screen shown in FIG. 10, the agricultural landinformation and agricultural crop information relating to that smallplot A1 are displayed. Based on this information, precise agriculturalwork management is possible.

In the above-described embodiment, the harvest amount and quality of theagricultural crop is sampled in units of work travel positions, but thepresent invention is not necessarily limited to this. For example, itmay be performed using one agricultural land surrounded by embankmentsas a unit. Furthermore, since the harvester 1 includes a harvested croptank in which the harvested crop is temporarily retained (e.g., in thecase of using a combine, a grain tank is included as the harvested croptank), the harvest amount and quality of the agricultural crop may besampled using the capacity of the harvested crop tank as one unit.

Also, in one preferred embodiment for performing sampling using acapacity that is smaller than the capacity of the grain tank 15 as aunit, a portion for temporarily retaining the harvested crop is includedin the grain tank 15. That is to say, an opening/closing lid mechanismis provided on the bottom of a temporary retention portion, and a sensorthat detects when the temporary retention portion is full and anelectrostatic capacitance proximity sensor are provided, and each timethe temporary retention portion becomes full, the opening/closing lid isopened, and the harvest amount is discharged to the grain tank 15. Atthe time of this discharge, quality measurement is performed by thetaste sensor 22, as a result of which quality data can be obtained. Bymeasuring the time for the temporary retention portion to become fulland the average vehicle speed during that time, the travel distanceuntil when the temporary retention portion becomes full can be obtained.The travel distance can be used as an index for the harvest amount(harvest amount index). Alternatively, it is also possible to obtain theharvest amount per travel distance, or in other words, the harvestamount per unit area of the agricultural land. By making an indexrelating to one or both of the thus-obtained harvest amount and qualityvisible on the map, a map of the harvest amount per unit small plot ofthe agricultural land can be created.

In the case of using a smartphone or a tablet computer as the terminal6, these devices usually include a near field communication functionsuch as a Wi-Fi function or Bluetooth (brand name), and therefore theterminal 6 can be used as a remote control for a specific operation ofthe harvester 1. In particular, if the harvester 1 is a combine, it isconvenient to be able to control vertical movement, left and rightpivoting, and the switching on and off of grain discharge of an unloaderequipped in the combine by operating the terminal 6. Furthermore, it ispossible to use a two-way data communication function between the ECU ofthe combine and the terminal 6 to define operations performed by remotecontrol according to the current position of the unloader. For example,it is possible to provide the terminal 6 with an operation button thatcauses the unloader to jut out counterclockwise toward the rear of thevehicle body when at a storage position, and causes the unloader to beautomatically stored when at any other position. This kind of remotecontrol function in the terminal 6 is realized using an application.

Second Embodiment

Next, one specific embodiment of a grain harvester that is applied tothe first embodiment of the present invention will be described withreference to the drawings. The grain harvester employed here is also acrawler-type self-hulling combine 1, which is shown in FIGS. 6 and 7.

As shown schematically in FIG. 11, the yield sensor 21 is a load cellattached to the device body frame 10, and the grain tank 15 is mountedon the load cell. That is to say, the yield sensor 21 measures the yieldof the harvested grain by measuring the weight of the grain tank 15 andof the grain retained therein. The yield per predetermined time isobtained by measuring the increase amount using the yield sensor 21 ateach predetermined sampling time. At this time, if consideration isgiven to the travel speed, it is also possible to obtain the yield perpredetermined distance. As shown schematically in FIG. 7 as well, in thepresent embodiment, the taste sensor 22 is incorporated in a tastemeasurement mechanism 30 that is mounted on a side wall of the graintank 15 from the exterior. Inside of the grain tank, the tastemeasurement mechanism 30 includes a measurement platform 30 a, whichswings between a horizontal orientation and a hanging orientation so asto open and close. The measurement platform 30 a is covered by acylindrical case having an upper opening and a lower opening. Also, themeasurement platform 30 a is provided at a position reached by a portionof the grain conveyed from the threshing apparatus 14 by the supplyingconveyor 31 and emitted from the introduction opening 15 a to the graintank 15 by a bladed wheel. This makes it possible for the measurementplatform 30 a in the horizontal orientation to catch grain that comesflying from the introduction opening 15 a. In the stage where apredetermined amount of grain is on the measuring platform 30 a,measurement is performed by the taste sensor 22. Here, spectral analysisis used, and measurement of grain moisture and protein value ispossible. Also, a taste value obtained based on the moisture, protein,and the ratio of these components can be used as the measurement value.When the measurement performed by the taste sensor 22 is complete, themeasurement platform 30 a is swung to the hanging orientation, accordingto which the grain on the measurement platform 30 a is released. Whenthe grain is released and a subsequent predetermined sampling time isreached, the measurement platform 30 a is swung once again to thehorizontal orientation.

A control system of the combine 1 is shown in FIG. 12. This controlsystem is substantially based on the basic principle shown in FIG. 4,but the data processing module 6 is constituted by a smartphone, whichis a mobile communication terminal held by a driver. Also, theharvesting position acquisition unit 23 that acquires the harvestingposition has been replaced by a GPS module 65 mounted in the smartphone.Accordingly, the control system for the combine 1 side is constituted bystandard constituent elements connected by a vehicle-mounted LAN.

That is to say, the functional units relating to the present inventionthat are constructed in the control system for the combine 1 side are atravel control ECU (electronic control unit) 53, a work apparatus ECU54, a sensor management module 5, a vehicle-mounted display 18, and adata input/output unit 50. The travel control ECU 53 is an ECU thatdeals with various types of control information relating to vehicletravel, and for example, includes a travel information generation unit53 a that converts data such as the travel speed, engine rotation speed,travel distance, and fuel efficiency, which are obtained from the sensormanagement module 5 via the vehicle-mounted LAN, into travelinformation. The work apparatus ECU 54 is an ECU that controls cuttingand harvesting apparatuses such as the cutting unit 12 and the threshingapparatus 14, and includes a work information generation unit 54 a thatconverts data indicating the operation state or driving state of thecutting and harvesting apparatuses into ground work information based onsensor information obtained from the sensor management module 5.

The sensor management module 5 has a function of receiving input ofmeasurement signals from various sensors such as the travel speed sensorand a travel distance sensor, in addition to the above-described tastesensor 22 (taste measurement mechanism 30) and yield sensor 21, andtransferring them to other functional units. In particular, the sensormanagement module 5 includes a yield measurement data generation unit 51that generates yield measurement data based on the measurement signalfrom the yield sensor 21, and a taste measurement data generation unit52 that generates taste measurement data based on the measurement signalfrom the taste sensor 22 (taste measurement mechanism 30).

The data input/output unit 50 is a wireless communication unit thatperforms communication at a relatively short range for data exchangewith the smartphone held by the driver, and it operates using a protocolsuch as Wi-Fi or Bluetooth (registered trademark).

The measurement data management unit 61 and the harvest evaluation unit62, which were described using the basic principle shown in FIG. 1, areconstructed here as smartphone applications. Also, a harvested grainproperty information storage unit 63 that stores harvested grainproperty information generated by the harvest evaluation unit 62 isconstructed in an external memory of the smartphone. For this reason,the measurement data management unit 61 receives the yield measurementdata and the taste measurement data from the yield measurement datageneration unit 51 and the taste measurement data generation unit 52 viathe data input/output unit 60 of the smartphone, which is capable ofperforming data exchange with the data input/output unit 50. Thesmartphone conventionally includes an owner ID management unit 67 and acommunication module 66 that functions as a line communication unit. Byusing the function of the owner ID management unit 67 to performauthentication of the driver, the security of information generated bythe combine 1 can be ensured. Also, using the communication module 66,the harvested grain property information can be transmitted to themanagement center 7, and can be stored in the harvested grain propertyinformation database 70.

In the above-described second embodiment, a sensor that measures theyield, taste, and the like of the harvested grain is provided in thecombine, and since harvested grain property information resulting fromlinking yield measurement data and taste measurement data to the fieldserving as the harvesting location can be generated while harvestingwork is being performed, evaluation is possible at the time ofharvesting the grain.

Furthermore, modified examples of the above-described embodiments willbe given below.

(1) The measurement platform 30 a of the taste measurement mechanism 30in which the taste sensor 22 is incorporated can also have a structureother than one that swings between a horizontal orientation and ahanging orientation. For example, as shown schematically in FIG. 13, astructure may be used in which the measurement platform 30 a is moved inand out of a box-shaped case for the taste measurement mechanism 30. Inthis case, the taste measurement mechanism 30 is arranged such that themeasurement platform 30 a, when in an extended state, can receive grainthat is conveyed from the threshing apparatus 14 by the supply conveyor31 and is emitted from the introduction opening 15 a of the grain tank15. With this structure, in a stage in which a predetermined amount ofgrain is on the measurement platform 30 a, the measurement platform 30 ais brought inside of the taste measurement mechanism 30, and measurementis performed by the taste sensor 22.

Also, the location at which the taste measurement mechanism 30 isarranged is not limited to the grain tank 15, and it is also possible toarrange it at a suitable location on the grain conveyance path 3 fromthe threshing apparatus 14 to the grain tank 15. Furthermore, in thecase of using a taste measure mechanism 30 that is capable of high-speedmeasurement processing, it is also possible to use grain being conveyed(flying grain emitted from the introduction opening 15 a, in particular)as the measurement target.

(2) In order to perform more accurate measurement, the yield sensor 21may use a configuration in which load cells are respectively arranged infour corner regions of the bottom surface of the grain tank 15, insteadof being constituted by a single load cell arranged near the center ofthe bottom surface of the grain tank 15.

(3) The harvested grain property information generated by the harvestevaluation unit 62 may be stored in the harvested grain propertyinformation storage unit 63 and the generated harvested grain propertyinformation may be transmitted to the management center 7 directly inreal time. Also, the generated harvested grain property information maybe transmitted to the management center 7 without being stored in theharvested grain property information storage unit 63.

(4) In the above-described embodiments, the data processing module 6 wasconstructed in the control system built into the grain harvester 1 or inthe mobile communication terminal held by the driver, but the dataprocessing module 6 may be constructed in a computer system with acommunication function that is installed at a location away from thefield.

(5) In the above-described embodiments, a grain harvester (combine) wasused as an agricultural crop harvester, but the present invention may ofcourse be applied to a grain harvester other than that. Also, a grainharvester in this context is used in a broad sense, and includes notonly rice and barley, but also corn and other crops.

INDUSTRIAL APPLICABILITY

The present invention can be applied not only to harvesting grain suchas rice, barley, and corn, but also to the fields of harvestingvegetables such as potatoes, carrots, and daikon, and harvesting fruitsuch as apples and mandarin oranges. Furthermore, the present inventioncan be applied not only to a crawler-type auto-hulling combine, but alsoto a regular combine and to a wheel-type combine.

DESCRIPTION OF REFERENCE SIGNS

-   -   1: Combine (agricultural crop harvester, grain harvester)    -   14: Threshing apparatus    -   15: Grain tank    -   21: Yield sensor (load cell)    -   22: Quality sensor (taste sensor, taste analyzer)    -   23: Harvesting position acquisition unit    -   3: Computer terminal (tablet computer, smartphone)    -   30: Positioning module    -   6: Data processing module    -   6 a: Agricultural land information generation unit    -   6 b: Agricultural crop information generation unit    -   6 c: Transmission information management unit    -   61: Measurement data management unit    -   62: Harvest evaluation unit    -   63: Harvested grain property information storage unit    -   65: GPS module    -   66: Communication module (line communication unit)    -   9: Positioning module    -   7: Management center    -   7A: Input/output server (Web server)    -   71: Data input unit    -   72: Data output unit    -   7B: Application server    -   73: Agricultural work evaluation unit    -   74: Table formation processing unit    -   7C: Database server    -   70: Harvested grain property information database    -   75: Primary database unit    -   76: Agricultural work evaluation database unit    -   77: Agricultural land map database unit

What is claimed is:
 1. An agricultural crop harvester configured tosend, to an agricultural work management computer system, agriculturalland information relating to an agricultural land in which harvestingwork is performed, and agricultural crop information relating to anagricultural crop obtained with the harvesting work, the agriculturalcrop harvester comprising: a positioning module configured to measurethe crop harvester's position; a yield sensor configured to measure aharvest amount of an agricultural crop harvested in the agriculturalland; an agricultural land information generation unit configured to,based on a measurement result of the positioning module, generateharvesting position data indicating a harvesting work position in theagricultural land as the agricultural land information; an agriculturalcrop information generation unit configured to generate harvest amountdata as the agricultural crop information based on a measurement resultof the yield sensor; a transmission information management unitconfigured to create transmission information by associating theagricultural land information and the agricultural crop information witheach other; and a communication module configured to send thetransmission information to the agricultural work management computersystem.
 2. The agricultural crop harvester according to claim 1, whereinthe agricultural crop information includes harvest amount per worktravel distance.
 3. The agricultural crop harvester according to claim1, wherein the agricultural land information is generated in associationwith small plots obtained by the agricultural land that is to besubjected to work being divided by a predetermined size, and theagricultural crop information is also generated in association with thesmall plots.
 4. A grain harvester comprising: a grain tank configured tostore grain sent from a threshing apparatus configured to carry outthreshing processing on grain stalks cut from a field; a yield sensorconfigured to measure yield of the grain; a measurement data managementunit configured to, in a time series, manage yield measurement datainput from the yield sensor; and a harvest evaluation unit configured togenerate harvested grain property information by linking togetherinformation on position in the field and the yield measurement data. 5.The grain harvester according to claim 4, wherein the yield sensor is aload cell included in the grain tank.
 6. The grain harvester accordingto claim 4, wherein as the yield, the yield of the grain harvested in apredetermined region of the field is calculated based on a travel routeand a yield per unit travel distance.
 7. The grain harvester accordingto claim 4, further comprising: a GPS module configured to measure acutting position of the grain stalks in the field, wherein the harvestedgrain property information includes the cutting position, and the yieldof the grain harvested in a predetermined region of the field arecalculated based on the harvested grain property information.
 8. Thegrain harvester according to claim 4, further comprising: a storage unitconfigured to store the harvested grain property information.
 9. Thegrain harvester according to claim 4, further comprising: a datainput/output unit capable of data communication with a mobilecommunication terminal, wherein the measurement data management unit andthe harvest evaluation unit are constructed in the mobile communicationterminal, and the harvested grain property information is sent to amanagement center via a line communication unit of the mobilecommunication terminal.
 10. The grain harvester according to claim 4,wherein the information on the position in the field is a small plotobtained by dividing a field into a plurality of small plots.